No word on the displacement of this new EA288 engine, but the article states that horsepower could rise from 140 up to 150 and quotes a VW spokesperson who says the next-gen TDI mill should realize about an eight-percent improvement in highway fuel economy compared to the current engine. Doing the math, that suggests future VW and Audi TDI models could get up to 45 or 46 mpg on the highway.